Conditions at Amoreira in December
December: Peak Winter Consistency and Cleanest Windows
December marks the statistical peak of the reliable winter season. Average surf is a solid 8ft (2.4m) with a 12.7-second period. Swell is still dominated by NW and WNW, at 25.1 percent and 16.8 percent, with NNW at 8.2 percent and W at 5.7 percent completing the picture. The biggest difference from midwinter is the wind: ideal wind windows are the highest of the entire year at 36 percent. The wind rose is much more balanced, with NNW dropping to 14.2 percent and meaningful ENE, ESE, E and SE flow appearing, often associated with continental high pressure and cleaner conditions. Water temperature is 16.1°C, air averages 12.2°C, and rain is plentiful. When everything lines up, December offers some of the best and most powerful surfing of the year at Amoreira.
Average Spot conditions at Amoreira in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at Amoreira during December. Based on historical data, there is a % probability of groundswell occurring this month. The chart below provides a detailed breakdown of the average wave height distribution, offering deep insights into the swell quality and surf potential you can expect at Amoreira for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Amoreira for December. Our analysis shows that favorable offshore or side-shore winds coincide with surfable swell approximately % of the time. The accompanying graph illustrates the average size distribution of waves during these optimal wind windows at Amoreira.